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3 de inmultit ( 2x-1) +32 =77

Răspuns :

3(2x-1) + 32 = 77
3(2x-1) = 77-32
3(2x-1) = 45
2x-1 = 45 : 3
2x-1 = 15
2x = 15 + 1 = 16
x = 16:2 = 8